//读取两个浮点数，并对它们做和差及乘积。
public class pp2_3
{ 
  public static void main(String []args)
  {
    float a,b;
    a = 4.8f;
    b = 8.4f;
    System.out.println("a + b ="+(a+b));
    System.out.println("a - b ="+(a-b));
    System.out.println("a * b ="+(a*b));
  }
}  
